Re: [PATCH v2 2/4] dmaengine: rcar-dmac: Add for_each_rcar_dmac_chan() helper

Geert Uytterhoeven
2021-01-27T08:08:18Z

Hi Laurent,

On Tue, Jan 26, 2021 at 10:55 PM Laurent Pinchart
<laurent.pinchart@ideasonboard.com> wrote:
> On Mon, Jan 25, 2021 at 03:24:29PM +0100, Geert Uytterhoeven wrote:
> > Add and helper macro for iterating over all DMAC channels, taking into
>
> s/and helper/a helper/

Oops.

> > account the channel mask. Use it where appropriate, to simplify code.
> >
> > Restore "reverse Christmas tree" order of local variables while adding a
> > new variable.
> >
> > Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

> > --- a/drivers/dma/sh/rcar-dmac.c
> > +++ b/drivers/dma/sh/rcar-dmac.c
> > @@ -209,6 +209,10 @@ struct rcar_dmac {
> >
> > #define to_rcar_dmac(d) container_of(d, struct rcar_dmac, engine)
> >
> > +#define for_each_rcar_dmac_chan(i, chan, dmac) \
>
> I would have placed the iterator (chan) after the container being
> iterated (dmac), but it seems there are some for_each_* macros doing it
> the other way around (they may be older though).

Makes sense.

> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

Thanks!

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds